Electronically deficient ( Rax , S , S )-F 12 -C 3 -TunePhos and its applications in asymmetric 1,4-addition reactions
作者:Shu-Bo Hu、Zhang-Pei Chen、Ji Zhou、Yong-Gui Zhou
DOI:10.1016/j.tetlet.2016.03.072
日期:2016.4
diphosphine ligand (Rax,S,S)-F12-C3-TunePhos has been concisely synthesized. The electron-poor ligand features both chiral centers and chiral axis bearing fluoro-functional groups on each phosphorus phenyl ring based on C3-TunePhos backbone. The catalyst composed of this ligand and rhodium showed excellent activities and enantioselectivities in asymmetric 1,4-addition reactions of arylboronic acids to
简明地合成了一种新型的电子缺陷的手性二膦配体(R ax,S,S)-F 12 -C 3 -TunePhos。贫电子配体的特征是基于C 3 -TunePhos主链的每个磷苯环上的手性中心和手性轴均带有氟官能团。由这种配体和铑组成的催化剂在芳基硼酸与ee高达99%的各种α,β-不饱和酮的不对称1,4-加成反应中显示出出色的活性和对映选择性。